Date registered: Mar 2011
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W202 Instrument Cluster Fault-why replacing it is simple
Same problem with my W202 instrument cluster. LED mileage display failed, fuel guage dead, rev counter stuck at zero, revs also at zero. Only temperature guage works. rev counter needle flickering ever so slightly and barely visible. Indicators, headlight flashers and background lighting all still working.
PROBLEM IS THE INSTRUMENT CLUSTER HAS A PROCESSOR CHIP FAILED IN IT. THIS 64 PIN CHIP NEEDS TO BE REPLACED, BETTER TO BUT A SECOND HAND CLUSTER FROM THE BREAKERS OR EBAY.
no need to remove steering wheel remove the side tweeter grill cover remove the air vent, push the cluster out by putting hand in the back of the cluster and pushing forward towards you. disconnect the multi pin connecter horizontal one first by sliding the cluster half way out towards the door (RHD Vehicle). push back to as if re-fitting it, turn steering wheel slightly to the left or Nearside if you prefer, and now push this side of the cluster towards the nearside which will expose the vertical multi pin connecter, now disconnect this. after having removed both the multi pin connecters carry on sliding the cluster towards the nearside and it will slide out at a slight downward facing angle.
fit new cluster but fit the horizontal connecter as soon as you can in the process and then the vertical when past center point. very easy proceedure takes about 20 minutes. DO NOT PUT IGNITION ON UNLESS YOU really have to ie releasing steering lock as this will mean having to live with an air bag light staying on after ignition for a bit or get the light re-set.
If you take the cluster out again I wonder if the air bag light will re-set itself? may try that next time if anyone here really gets stuck with this cluster problem.
HAD TO WRITE up as I didnt get the answer very easily to this probelm anywhere on the merc forums.
The replacement cluster by the way has the mileage of the car it came off, so take the old cluster when having an MOT done, it will save a lot of embarrasment.
Last edited by rustfree0; 03-14-2011 at 03:28 PM.
Reason: additional info